Sitting at some lights waiting to turn right. Police car in front of me at the front of the line. Police car behind me(getting anyone nervous???). Both had been driving normally up to the lights. As the filter light turns green the front cop car takes off at warp factor 6 without blues and 2s leaving me in his wake. I pull out normally keeping in mind the other cop was behind me, or so I thought. As I pull into the right lane through the lights, I think maybe the cop behind me will want to follow his mate, better get out of his way so I decide to lane change to the left. As I do the head check, the cop car behind me screams past my left with WOT, just as I was starting to shift my weight in anticipation of making the lane change. As he goes abeam me the blues come on but no 2s. He had commenced the overtake down my left side as soon as he pulled out from the lights. If I had used what situational awareness I thought I had I would have side-swiped him. Would have made for an interesting fine/court case given he didn't turn his lights on until he was abeam me, and never used his siren, and he had gone two wide around me from a one lane turn right. He must have broken a road law to get where he was and he wouldn't have been able to say he had his lights on when he did it. They probably would have fined me with making an unsafe lane change and neg driving I guess.